Once you have become friends with the Twins, go to the photo studio on Tuesday at 13:00. Hailey will tell you to buy a camera for $100 (you can get it from the electronics store online on the laptop in the bedroom). Once you have the camera go back and see her on Tuesday at 13:00 and she will explain to you how to use the camera. From then on you can go to the photo studio at 13:00 and use it whenever Hailey is not there. You will see a book on the desk, click on it and from there you can select the girls for the photo shoot. The right page shows you who is available. If you see a message about don't have enough rank or need to know the girls better, you need to continue on thier routes more to advance. You will see both Mayo and Iris as choices, but only the one you are dating can do the photo shoot.HOw to get photo shoot